VARIABILITY OF HYDROLOGICAL AND HYDROCHEMICAL CHARACTERISTICS IN A STRATIFIED RESERVOIR
Abstract
The procedure of rapid synchronous hydrological surveys of three polygons in different parts of the slow-circulating valley Mozhaisk reservoir performed on July 19, 2014, under the «Triple polygon–2014» experiment is presented. The grid density of 58 stations (st.) within the three polygons ranged from 1 st. per 14 ha to 1 st. per 5 ha. Such stations concentration was never reached during limnological surveys on lakes and reservoirs, either in Russia or abroad. This made it possible to perform a reliable, statistically valid estimate of a microscale heterogeneity (patchiness) of water composition and properties in different parts of a multi-stretch reservoir under the same weather conditions. Survey data showed the patchiness of measured values of temperature (coefficient of variation Cv reaching 0.03), oxygen content (Cv up to 0.49) and chlorophyll «a» (Cv up to 0.22), due to water masses vertical stratification and changing synoptic conditions during the day. It was detected that the spatial variability of non-conservative water quality indices is often more pronounced in thermocline layers rather than the surface layers of summer-stratified valley reservoir. Results of cartographical and statistical evaluation of spatial heterogeneity of water quality indices obtained during the experiment can be applied to improve the monitoring of reservoirs – the centralized water supply sources and recreational centers, and suggest the procedures for the simulation of their hydro-ecological regime by mathematical models.
About the Authors
D. I. Sokolov
Lomonosov Moscow State University
Russian Federation
Faculty of Geography, Department of Land Hydrology, Senior Scientific Researcher, PhD. in Geography
Russian Federation
Faculty of Geography, Department of Land Hydrology, Senior Scientific Researcher, PhD. in Geography
O. N. Erina
Lomonosov Moscow State University
Russian Federation
Faculty of Geography, Department of Land Hydrology, Scientific Researcher, PhD. in Geography
Russian Federation
Faculty of Geography, Department of Land Hydrology, Scientific Researcher, PhD. in Geography
K. K. Edelshtein
Lomonosov Moscow State University
Russian Federation
Faculty of Geography, Department of Land Hydrology, Professor, D.Sc. in Geography
Russian Federation
Faculty of Geography, Department of Land Hydrology, Professor, D.Sc. in Geography
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Review
For citations:
Sokolov D.I., Erina O.N., Edelshtein K.K. VARIABILITY OF HYDROLOGICAL AND HYDROCHEMICAL CHARACTERISTICS IN A STRATIFIED RESERVOIR. Vestnik Moskovskogo universiteta. Seriya 5, Geografiya. 2016;(5):61-68. (In Russ.)
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